Gold-mining or placer machine.



Patented Dec. Il, |900. I C. BARWICK.

`GIJLD MINING 0R PLACER MACHINE.

(No Model.)

(Application led May 3, 1900.)

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'GoLn MIMNG on PLACER MACHINE.

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OHARLESFBARWICK, OF DENVER, COLORADO.

GOLD'QIVIINING OR PLACERV MACHINE.

SPECIFIGATION forming peut ef Lettere Patent No. 663,717, def-.ed December ii, 1960.

Application led May 3, 1900. berial No. 15,386. LN@ model.)

To all whom t may concern..-

Be it known that I, CHARLES BARWICK, a. citizen of the United States, residing at Denver, in the county of Arapahoe and State of Colorado, have invented certain new and useful Improvements in Gold-Mining or Placer Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in machines for washing auriferous ores and separating the values therefrom; and it has for its object to provide a machine whereby the washing and separating of the values from the gangue and other refuse is more readily and thoroughly accomplished than by machines of this sort now commonly in use for this purpose.

My invention consists principally in the novel construction and arrangement of the vibrating pan, hereinafter described and claimed, as Well as its mounting.

My invention will be understood by reference to the accompanying drawings, wherein the same parts are indicated by the same letters of reference throughout the several views.

Figure l represents a top plan view of a pan and its supports constructed according to my invention. Fig. 2 is a side elevation of the parts shown in Fig. l, with the addition of a portion of the discharge end of the sluice-box. Fig. 3 is a central longitudinal section th rough l the concentrating-pan, and Fig. 4e is a rear elevation of the concentrating-pan and its Inov-` able supports. Fig. 5 is a plan view of the screen at the end of the sluice.

The concentrating-pan A is formed in somewhat the shape of a trough, having one closed end A0, at which end the pan has its greatest depth, and one open end A', at which end said pan has its least depth. The sides A2 A2 are similarly formed of a width at the closed end A0 equal to that. of the depth of the pan at said end and narrowing gradually toward the opposite end A', at which end said sides A2 are preferably rounded over to the edge of the bottom of the pan, as seen in the drawings. The bottom A3 of the concentrating-pan is flat and is provided with a series of grooves,

pref erablyin the form of corrugations. Where a sheet-metal pan is used, the arrangement of the grooves is best shown in Fig. l. Near the deep end of the said pan the bottom A3 has a well A4, located, preferably, centrally of the bottom of the pan and provided with a removable closure, such as a screw-plug 0.4, as seen most clearly in Fig. 3.

Referring again to Fig. l, it will be seen that I provide a central longitudinal groove or channel A5, which leads from a point near the open end A of the pan to the said well A4 near the opposite closed end. I also provide a succession of transverse grooves or channels AG, which communicate along the central longitudinal line of the bottom of the pan formed perforated lugs A8 A9, arranged in' pairs, for the passage of bolts, hereinafter described, for securing the pan to its vibrating support.

The pan is supported upon a wheeled truck or skeleton platform B, the Wheels B0 of which are mounted upon tracks BQ fixed upon suitable `base-timbers B2, as seen in Figs. l and 2 of the drawings. Pairs of bolts B3 and B4, passing upwardly through the side members of the wheeled truck or platform B, engage the pairs of lugs A8 A9 on the sides of the concentrating-pan A. Ooiled springs O and O' are fitted over these bolts and confined between the said lugs A8 A9 and the side members of the wheeled truck or platform upon which the said springs rest, and the pan is secured in this position by means of thumbnuts D and D', which are screwed down over the ends of the bolts B3 and B4 upon the said lugs A8 A9. The bottom of the pau near its deep end may rest upon one of the side members of the truck or platform, while the pan near its open end would be entirely out of contact with the truck or platform. The

springs O' entirely support the open end of loo ment of the pan between the said stops, are

provided for preventing too great lateral motion of the pan when the machine is in operation.

The Wheeled platform or truck is given short rapid Vibrations to and fro along the rails B by any suitable pitman connections with any suitable or convenient source of 4power.

In Fig. l, F represents a frame pivoted at its ends in lugs F0. One of the end members of the frame B and this frame Fis connected to a strap F', inclosing an eccentric F2, driven through intermeshing gears F3 and F4, by means of a pulley F5, connected with a belt from anysuitable source vof power.

The gearing and connections for vibrating the wheeled platform or truck B, carrying the concentrating-pan, of whatever form or arrangement, should be so arranged as to impart short but rapid vibration to the said platform or truck.

The apparatus herein described and shown is for use particularly in placer-mining, and the washings are delivered to the concentrating-pan A at the closed end thereof, where the pan is deepest. In this way the heavier particles of gold may fallto the bottom of the concentrating-pan and by the vibration of the latter be caused to fall into the well A4. The lighter particles ot ore mixed with dirt or gangue will be carried along toward the open end of the pan, and by reason of the vibration of the pan and the agitation of the water therein any particles of gold that may adhere to the lighter particles of waste matter will be separated and will fall to the bottom of the pan and will pass into the grooves or channels A6 and thence'through the channel A5 to the well or receptacle A4,

the heavier particles gravitating by their own weight toward the lower closed end of the pan. The water and all like material will be passing constantly over the open end of the pan, while the sand and gravel will beldeposited to some extent upon the bottom of the pan; but the inclination of the bottom being so slight the constant agitation of the pan and the mass of water and solid matter therein will keep the particles of sand and gravel moving, so that the latter cannot accumulate to a depth sufficient to impede the free movement and gravitation of the heavier particles of gold.

In Figs. 2 and 5,H represents the sluice for con veying the water to the concentrator. At the end of this sluice is a sluice-box H', in which is mounted an undershot paddle-wheel H2, which is revolved by the iiow of the water and which drives the rotary screen H3 by means of a belt H4, passing over pulleys h2 and h3 on shafts of the said paddle-wheel and rotary screen, respectively. In the bottom of the sluice-boX H', near its lower end, is a screen through which the fine particles of ore pass into the rearwardly-inclined trough H5 and thence downwardly and are discharged into the rear end of the concentrating-pan A. The boulders and coarse gravel pass out of one end of the rotary screen and are carried off in any suitable way, leaving the finer particles of sand and orey to pass through the meshes of the said screen and thence, as described, into the concentrating-pan. The meshes of the screen are keptclear by a current of water induced into the screen through a pipe H6, connected at its upper end with the sluice and taking water therethrough, said pipe discharging through a spraying device of any suitable arrangement with the said rotary screen.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

l. In an apparatus for washing and concentrating ores, the combination with a reciprocating frame, ofa concentrating-pan provided with a closed end and an open end mounted transversely of the said frame, and set at an inclination downward from the said open end; a well or pocket in the bottom of said pan near its closed` end, a longitudinal channel in the said bottom leading to the said well or pocket; transverse channels leading to the said longitudinal channel; perforated lugs on IOO the side edges of the said pan, screw-threaded bolts mounted in the said frame and engagin g the said perforated lugs; coiled springs interposed between the said lugs and the said frame and surroundingsaid bolts; and thumbnuts engaging the ends ofn the said bolts for adjusting the inclination of the said pan upon the said frame, substantially as described.

2. In an apparatus forwashing and concentrating ores, the combination with a reciproeating frame, ofa concentrating-pan provided with a closed end and an open end mounted transversely of the said frame, and set at an inclination downward from the said open end; a well or pocket in the bottom of said pan near its closed end, a longitudinal channel in the said bottom leading to the said well or pocket; transverse channels leading to the said'longitudinalchannel; perforated lugson the side edges ofthe said pan, screw-threaded bolts mounted in the said frame and engagin g the said perforated lugs; coiled springs interposed between the said lugs and the said frame, and surrounding said bolts; and thumb-nuts engaging the ends of the said bolts for adjusting the inclination of the said pan upon the said frame; stops permitting of IIO IZO

vertical adjustment of the said pan, but preventing lateral movement thereof With `respect to the said frame, substantially as described.

3. In an ore Washing and concentrating machine, the combination with a reciprocating support, oi" a concentrating-pan having a substantially rectangular oblong bottom, and outwardly-inclined closed sides and one end,

and one open end, and having in its bottom near the closed end, a Well or pocket provided with a removable bottom-closure; a longitudinal channel leading from the vicinity of the open end communicating With the said Well or pocket; transverse channels com- 

